FR2182645A1 - Thermoplastic bottles with concave base - produced by post forming of base for optimum peripheral strength - Google Patents

Thermoplastic bottles with concave base - produced by post forming of base for optimum peripheral strength

Info

Publication number
FR2182645A1
FR2182645A1 FR7215538A FR7215538A FR2182645A1 FR 2182645 A1 FR2182645 A1 FR 2182645A1 FR 7215538 A FR7215538 A FR 7215538A FR 7215538 A FR7215538 A FR 7215538A FR 2182645 A1 FR2182645 A1 FR 2182645A1
Authority
FR
France
Prior art keywords
base
produced
concave
freezing
centre
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7215538A
Other languages
French (fr)
Other versions
FR2182645B3 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PIOTROWSKI TADEUSZ FR
Original Assignee
PIOTROWSKI TADEUSZ FR
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PIOTROWSKI TADEUSZ FR filed Critical PIOTROWSKI TADEUSZ FR
Priority to FR7215538A priority Critical patent/FR2182645A1/en
Publication of FR2182645A1 publication Critical patent/FR2182645A1/en
Application granted granted Critical
Publication of FR2182645B3 publication Critical patent/FR2182645B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/54—Moulds for undercut articles
    • B29C49/541—Moulds for undercut articles having a recessed undersurface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/54—Moulds for undercut articles
    • B29C2049/542—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles
    • B29C2049/548—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles the movement of the mould parts during opening of the mould are interlinked

Abstract

A concave base is formed on a thermoplastic container by first producing a full size moulding with a flat base, freezing the peripheral zones of the base, then deforming the centre of the base inwards to obtain a conical draw on theintermiediate zones of the base prior to freezing. Pref. cooling air is circulated over the outer surfaces of the base during deformation, and deformation of the base is effected after the principal blowing pressure has been vented or with a compensating pressure on the underside of the base. Esp. for mfr. of blow moulded bottles for containing pressurised or carbonated liquids. Material distribution is optimised by maintaining the parison wall thickness at the outer boundaries of the base without excessive thickness at the centre of the bottle. Control of material orientation is facilitated for optimum strength of the base.
FR7215538A 1972-05-02 1972-05-02 Thermoplastic bottles with concave base - produced by post forming of base for optimum peripheral strength Granted FR2182645A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7215538A FR2182645A1 (en) 1972-05-02 1972-05-02 Thermoplastic bottles with concave base - produced by post forming of base for optimum peripheral strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7215538A FR2182645A1 (en) 1972-05-02 1972-05-02 Thermoplastic bottles with concave base - produced by post forming of base for optimum peripheral strength

Publications (2)

Publication Number Publication Date
FR2182645A1 true FR2182645A1 (en) 1973-12-14
FR2182645B3 FR2182645B3 (en) 1975-07-18

Family

ID=9097843

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7215538A Granted FR2182645A1 (en) 1972-05-02 1972-05-02 Thermoplastic bottles with concave base - produced by post forming of base for optimum peripheral strength

Country Status (1)

Country Link
FR (1) FR2182645A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2516895A1 (en) * 1981-11-26 1983-05-27 Plm Ab CONTAINER AND DEVICE AND METHOD FOR OBTAINING THE SAME
FR2591142A1 (en) * 1985-12-05 1987-06-12 Krupp Corpoplast Masch METHOD AND DEVICE FOR MANUFACTURING HOLLOW BODY WITH RING-SHAPED BASE BY MOLDING WITH BLOWING
WO2002098631A1 (en) * 2001-06-06 2002-12-12 Gomez Cao Jose Luis Method for molding a plastic bottle with a shaped bottom and resulting bottle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2516895A1 (en) * 1981-11-26 1983-05-27 Plm Ab CONTAINER AND DEVICE AND METHOD FOR OBTAINING THE SAME
FR2591142A1 (en) * 1985-12-05 1987-06-12 Krupp Corpoplast Masch METHOD AND DEVICE FOR MANUFACTURING HOLLOW BODY WITH RING-SHAPED BASE BY MOLDING WITH BLOWING
WO2002098631A1 (en) * 2001-06-06 2002-12-12 Gomez Cao Jose Luis Method for molding a plastic bottle with a shaped bottom and resulting bottle
ES2180437A1 (en) * 2001-06-06 2003-02-01 Cao Jose Luis Gomez Method for molding a plastic bottle with a shaped bottom and resulting bottle

Also Published As

Publication number Publication date
FR2182645B3 (en) 1975-07-18

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Legal Events

Date Code Title Description
ST Notification of lapse